giles f00054309d mk: mapo (relational map) — 300/300 milestone ...

(mapo rel l1 l2) takes a 2-argument relation rel and asserts l2 is l1
with each element rel-related to its counterpart. Recursive on both
lists in lockstep. Works forward (fixed l1, find l2), backward (fixed
l2, find l1), or constraining mid-pipeline.

Composes with intarith for arithmetic transforms:
  (mapo (fn (a b) (*o-i a a b)) (list 1 2 3 4) q) -> ((1 4 9 16))

7 new tests, 300/300 cumulative.

2026-05-08 11:11:26 +00:00

1.0 KiB

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